当窗体离屏幕四周一定距离时，改变窗体位置，引导窗体靠边；靠边后，当鼠标离开窗体时，改变窗体位置，窗体隐藏，凸出一点在屏幕内；隐藏后，当鼠标移到窗体时，窗体显示。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms; namespace FrmZoom
{
public partial class FrmMain : Form
{
// 窗体是否引导
bool isGuide = false;
// 窗体是否隐藏
bool isShrink = false;
// 窗体引导距离
const int GUIDE_DISTANCE = ;
// 窗体靠边凸出部分距离
const int BULGE_DISTANCE = ; public FrmMain()
{
InitializeComponent();
} private void Form1_Load(object sender, EventArgs e)
{
// 设置500毫秒检查一次窗体是否需要缩放
this.timZoom.Interval = ;
// 启动窗体缩放事件
this.timZoom.Enabled = true;
} /// <summary>
/// 引导窗体
/// </summary>
private void GuideFrm()
{
/* 判断窗体边缘是否进入引导距离
* true 靠边，“isGuide = false;”，窗体已引导
* false “isGuide = false;”，窗体未引导
*/
if (this.Left < GUIDE_DISTANCE && this.Left > -GUIDE_DISTANCE)
{
this.Left = ;
isGuide = true;
}
else if (this.Top < GUIDE_DISTANCE && this.Top > -GUIDE_DISTANCE)
{
this.Top = ;
isGuide = true;
}
else if (this.Right < (Screen.GetWorkingArea(this).Width + GUIDE_DISTANCE) && this.Right > (Screen.GetWorkingArea(this).Width - GUIDE_DISTANCE))
{
this.Left = Screen.GetWorkingArea(this).Width - this.Width;
isGuide = true;
}
else
{
isGuide = false;
}
} /// <summary>
/// 隐藏窗体
/// </summary>
private void HideFrm()
{
/* 窗体是否靠边
* true 窗体隐藏
* false
*/
if (this.Left == )
{
this.Left = -(this.Width - BULGE_DISTANCE);
}
else if (this.Top == )
{
this.Top = -(this.Height - BULGE_DISTANCE);
}
else if (this.Right == (Screen.GetWorkingArea(this).Width))
{
this.Left = Screen.GetWorkingArea(this).Width - BULGE_DISTANCE;
}
// 窗体已隐藏
isShrink = true;
// 窗体引导关闭
isGuide = false; // 窗体置顶
this.TopMost = true;
// 在Windows任务栏中不显示窗体
this.ShowInTaskbar = false;
} /// <summary>
/// 显示窗体
/// </summary>
private void ShowFrm()
{
// 窗体是否靠边
if (this.Left == -(this.Width - BULGE_DISTANCE))
{
this.Left = ;
}
else if (this.Top == -(this.Height - BULGE_DISTANCE))
{
this.Top = ;
}
else if (this.Right == Screen.GetWorkingArea(this).Width + this.Width - BULGE_DISTANCE)
{
this.Left = Screen.GetWorkingArea(this).Width - this.Width;
}
// 窗体未隐藏
isShrink = false; // 窗口不置顶
this.TopMost = false;
// 在Windows任务栏中显示窗体
this.ShowInTaskbar = true;
} /// <summary>
/// 窗体缩放
/// </summary>
private void ZoomFrm()
{
// 获取鼠标位置
int mouseX = MousePosition.X;
int mouseY = MousePosition.Y;
// 获取窗体位置
int frmX = this.Location.X;
int frmY = this.Location.Y; /* 鼠标是否在窗体内
* true 显示窗体
* false 隐藏窗体
*/
if (mouseX > frmX - && mouseX < frmX + this.Width + && mouseY > frmY - && mouseY < frmY + this.Height + )
{
// 窗体隐藏时才显示窗体
if (isShrink)
{
ShowFrm();
}
}
else
{
// 窗体引导时才隐藏窗体
if (isGuide)
{
HideFrm();
}
}
} /// <summary>
/// 移动窗体事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void FrmMain_Move(object sender, EventArgs e)
{
// 引导窗体
GuideFrm();
} /// <summary>
/// 窗体缩放事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void timZoom_Tick(object sender, EventArgs e)
{
// 缩放窗体
ZoomFrm();
}
}
}